Kurdish forces are digging deeper into Syria’s Raqqa province.br br YPG militia are advancing towards ISIL-controlled Tal Abyad, at the Turkish border.br br They are setting their sights set on taking the town, raising the prospect of a battle at the border. br br For the YPG, seizing Tal Abyad would help them link up Kurdish-controlled areas in Hasaka province and Kobani. br br The town is important to the self-proclaimed Islamic State group as the nearest border area to its de facto capital of Raqqa city.br br Fighting near the border has already forced 13-thousand people to cross into Turkey from Syria. br br Some 15-hundred more are still waiting to escape. Turkish soldiers sprayed water and fired into the air when some of them approached the border fence on Saturday, according to a security source. br br But it is not just ISIL and refugees troubling Ankara. It is also worried about the expansion of Kurdish influence near its territory.